SPIE OPTO最新文献_第5页

Silicon plasmonic-integrated sensor 硅等离子体集成传感器

SPIE OPTO Pub Date : 2016-03-16 DOI: 10.1117/12.2214103

Ahmad Ayoub, Qiaoqiang Gan, M. Swillam

引用次数: 9

Fabrication of high-quality nanobeam photonic crystal cavities in 4H silicon carbide with embedded color centers 嵌入色心的4H碳化硅高质量纳米束光子晶体腔的制备

SPIE OPTO Pub Date : 2016-03-16 DOI: 10.1117/12.2211230

David O. Bracher, E. Hu

{"title":"Fabrication of high-quality nanobeam photonic crystal cavities in 4H silicon carbide with embedded color centers","authors":"David O. Bracher, E. Hu","doi":"10.1117/12.2211230","DOIUrl":"https://doi.org/10.1117/12.2211230","url":null,"abstract":"A wide band-gap semiconductor with a long history of growth and device fabrication, silicon carbide (SiC) has attracted recent attention for hosting several defects with properties similar to the nitrogen vacancy center in diamond. In the 4H polytype, these include the silicon vacancy center and the neutral divacancy, which have zero phonon lines (ZPL) in the near-IR and may be useful for quantum information and nanoscale sensing. For many such applications, it is critical to increase the defect emission into the ZPL by coupling the emission to an optical cavity. Accordingly, we have pursued the fabrication of high quality 1D nanobeam photonic crystal cavities (PCCs) in 4H-SiC, using homoepitaxially grown material and a photoelectrochemical etch to provide optical isolation. These PCCs are distinctive in their high theoretical quality factors (Q > 106) and low modal volumes (V < 0.5 (λ/n)3). Here, we present arrays of nanobeam PCCs with varied lattice constant containing embedded silicon vacancy defects generated by electron irradiation, to assess its viability as a method for defect creation. The lattice constant variation allows us to create devices with modes spanning the entire range of the silicon vacancy emission. We accordingly demonstrate nanobeam PCCs with resonant modes near both ZPLs of the silicon vacancy defect. Moreover, we measure devices with the highest Q cavity modes coupled to point defect emission in SiC yet reported, providing evidence that electron irradiation can be used to generate point defects while maintaining high quality optical devices.","PeriodicalId":122702,"journal":{"name":"SPIE OPTO","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123146276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A system for full Stokes vector measurement for low concentration glucose sensing 用于低浓度葡萄糖传感的全斯托克斯矢量测量系统

SPIE OPTO Pub Date : 2016-03-16 DOI: 10.1117/12.2212605

Q. Phan, Y. Lo

{"title":"A system for full Stokes vector measurement for low concentration glucose sensing","authors":"Q. Phan, Y. Lo","doi":"10.1117/12.2212605","DOIUrl":"https://doi.org/10.1117/12.2212605","url":null,"abstract":"A high performance system for full Stokes vector measurements was developed. The proposed system comprised a polarization scanning generator (PSG) and a high accuracy polarization state analyzer (PSA) was proposed. The PSG generated full state of polarization of light by using voltage driven electro-optics modulator without using any mechanical moving parts. The PSA was employed to record the intensity of output polarized lights in a high speed manner. The accuracy of proposed system was 10-4 for all Stokes vector (S0, S1, S2, S3) measurements in the full state of polarization of lights. An application of proposed system for low concentration glucose in aqueous solution sensing with/without scattering effects was demonstrated. The sensitivity of the optical rotation angle of CB property to changes in the concentration of glucose sample was examined over the range from 0 to 0.5g/dl. The results confirm that the proposed system is able to detect glucose at fine concentration of 0.02g/dl. The linear variation of the optical rotation angle and different glucose concentration at different scattering effects was obtained. In general, the new measurement system proposed in this study provided a fast and reliable method to measure all Stokes vectors and its potential applications in biological sensing.","PeriodicalId":122702,"journal":{"name":"SPIE OPTO","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116273834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Complex light in 3D printing 3D打印中的复杂光

SPIE OPTO Pub Date : 2016-03-16 DOI: 10.1117/12.2209603

C. Moser, P. Delrot, D. Loterie, Edgar E. Morales Delgado, M. Modestino, D. Psaltis

{"title":"Complex light in 3D printing","authors":"C. Moser, P. Delrot, D. Loterie, Edgar E. Morales Delgado, M. Modestino, D. Psaltis","doi":"10.1117/12.2209603","DOIUrl":"https://doi.org/10.1117/12.2209603","url":null,"abstract":"3D printing as a tool to generate complicated shapes from CAD files, on demand, with different materials from plastics to metals, is shortening product development cycles, enabling new design possibilities and can provide a mean to manufacture small volumes cost effectively. There are many technologies for 3D printing and the majority uses light in the process. In one process (Multi-jet modeling, polyjet, printoptical©), a printhead prints layers of ultra-violet curable liquid plastic. Here, each nozzle deposits the material, which is then flooded by a UV curing lamp to harden it. In another process (Stereolithography), a focused UV laser beam provides both the spatial localization and the photo-hardening of the resin. Similarly, laser sintering works with metal powders by locally melting the material point by point and layer by layer. When the laser delivers ultra-fast focused pulses, nonlinear effects polymerize the material with high spatial resolution. In these processes, light is either focused in one spot and the part is made by scanning it or the light is expanded and covers a wide area for photopolymerization. Hence a fairly “simple” light field is used in both cases. Here, we give examples of how “complex light” brings additional level of complexity in 3D printing.","PeriodicalId":122702,"journal":{"name":"SPIE OPTO","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129478471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Few-photon control in nanometer-scale engineered fiber devices 纳米级工程光纤器件中的少光子控制

SPIE OPTO Pub Date : 2016-03-16 DOI: 10.1117/12.2218196

A. Pejkic, S. Radic

引用次数: 0

Coated fiber tips for optical instrumentation 光学仪器用涂层光纤尖端

SPIE OPTO Pub Date : 2016-03-16 DOI: 10.1117/12.2211083

J. Barton, S. Chanda, S. Locknar, G. Carver

引用次数: 5

Fabrication and characterization of broadband superluminescent diodes for 2 μm wavelength 波长为2 μm的宽带超发光二极管的制备与表征

SPIE OPTO Pub Date : 2016-03-16 DOI: 10.1117/12.2209720

N. Zia, J. Viheriälä, R. Koskinen, M. Koskinen, S. Suomalainen, M. Guina

引用次数: 4

Linear rotary optical delay lines 线性旋转光延迟线

SPIE OPTO Pub Date : 2016-03-16 DOI: 10.1117/12.2216297

H. Guerboukha, Hang Qu, M. Skorobogatiy

引用次数: 0

Frequency-domain single-shot optical frequency comb tomography using VIPA 使用VIPA的频域单次光学频率梳层析成像

SPIE OPTO Pub Date : 2016-03-16 DOI: 10.1117/12.2212093

Takumi Miyaoka, T. Shioda

引用次数: 0

Long-term measurements of SPR hydrogen sensor based on hetero-core optical fiber with Au/Ta2O5/Pd/Au multilayers Au/Ta2O5/Pd/Au多层异质芯光纤SPR氢传感器的长期测量

SPIE OPTO Pub Date : 2016-03-16 DOI: 10.1117/12.2210826

Ken Takahashi, A. Hosoki, M. Nishiyama, H. Igawa, Kazuhiro Watanabe

{"title":"Long-term measurements of SPR hydrogen sensor based on hetero-core optical fiber with Au/Ta2O5/Pd/Au multilayers","authors":"Ken Takahashi, A. Hosoki, M. Nishiyama, H. Igawa, Kazuhiro Watanabe","doi":"10.1117/12.2210826","DOIUrl":"https://doi.org/10.1117/12.2210826","url":null,"abstract":"Demands for a hydrogen fuel has been increased due to usages as an ecological and alternative energy resource. On the other hand, hydrogen easily causes an explosion above concentrations of 4 % in air, hence hydrogen sensors are need to have rapidity and accuracy for detecting hydrogen. Conventional hydrogen sensors have mainly used palladium (Pd) which is known as a hydrogen detecting material with high sensitivities and selectivity to hydrogen. Generally, Pd absorbs hydrogen in large amounts and forms Pd hydride, moreover, Pd experiences α-β phase transition during volume change of Pd with hydrogen absorption. As a result, the volume change of Pd induces a deterioration which affects time responses and sensitivities of hydrogen sensors. To keep Pd from deteriorating, alloying Pd with metals, such as Au and Ag, has been utilized as preventing Pd from experiencing α-β phase transition. In this paper, we propose a hetero-core optical fiber hydrogen sensor based on surface plasmon resonance (SPR) with multi-layers of Au/Ta2O5/Pd/Au in order to suppress the deterioration of Pd. A few sensors were prepared with the same construction of sensitive film 25-nm Au/ 60-nm Ta2O5/ thicknesses with stacks of annealed 3 double layers of 1.4-nm Pd and 0.6-nm Au or 5-nm pure Pd, and evaluated in terms of the time response and sensitivities. The response times at the 1st and the 15th hydrogen absorption test were experimentally observed to be from 3 s to 6 s for annealed Pd-Au, in contrast, to be from about 16 s to 22 s for pure Pd at 4 % hydrogen concentration, respectively.","PeriodicalId":122702,"journal":{"name":"SPIE OPTO","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125700982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1